1

TCVN T I U C H U N Q U C G I A

TCVN 8817-5 : 2011

Xut bn ln 1

NH TNG NHA NG A XT - PHNG PHP TH

-

PHN 5: XC NH IN TCH HT

Cationic Emulsified Asphalt - Test Method -

Part 5: Test Method for Particle Charge

H NI 2011

TCVN 8817-5 : 2011

3

Li ni u

TCVN 8817-5:2011 c chuyn i t 22 TCN 354:2006 theo quy nh ti

khon 1 iu 69 ca Lut Tiu chun v Quy chun k thut v im a khon

1 iu 7 Ngh nh s 127/2007/N-CP ngy 01/8/2008 ca Chnh ph quy

nh chi tit thi hnh mt s iu ca Lut Tiu chun v Quy chun k thut.

TCVN 8817:2011 do Vin Khoa hc v Cng ngh Giao thng vn ti bin

son, B Giao thng vn ti ngh, Tng cc Tiu chun o lng cht

lng thm nh, B Khoa hc v Cng ngh cng b.

B tiu chun TCVN 8817:2011 bao gm 15 phn:

TCVN 8817-1:2011, Nh tng nha ng a xt Phn 1: Yu cu k thut

TCVN 8817-2:2011, Nh tng nha ng a xt Phng php th Phn 2: Xc nh nht

Saybolt Furol

TCVN 8817-3:2011, Nh tng nha ng a xt Phng php th Phn 3: Xc nh lng

v n nh lu tr

TCVN 8817-4:2011, Nh tng nha ng a xt Phng php th Phn 4: Xc nh lng

ht qu c (Th nghim sng)

TCVN 8817-5:2011, Nh tng nha ng a xt Phng php th Phn 5: Xc nh in tch

ht

TCVN 8817-6:2011, Nh tng nha ng a xt Phng php th Phn 6: Xc nh kh

nh

TCVN 8817-7:2011, Nh tng nha ng a xt Phng php th Phn 7: Th nghim trn

vi xi mng

TCVN 8817-8:2011, Nh tng nha ng a xt Phng php th Phn 8: Xc nh dnh

bm v tnh chu nc

TCVN 8817-9:2011, Nh tng nha ng a xt Phng php th Phn 9: Th nghim

chng ct

TCVN 8817-5 : 2011

4

TCVN 8817-10:2011, Nh tng nha ng a xt Phng php th Phn 10: Th nghim

bay hi

TCVN 8817-11:2011, Nh tng nha ng a xt Phng php th Phn 11: Nhn bit nh

tng nha ng a xt phn tch nhanh

TCVN 8817-12:2011, Nh tng nha ng a xt Phng php th Phn 12: Nhn bit nh

tng nha ng a xt phn tch chm

TCVN 8817-13:2011, Nh tng nha ng a xt Phng php th Phn 13: Xc nh kh

nng trn ln vi nc

TCVN 8817-14:2011, Nh tng nha ng a xt Phng php th Phn 14: Xc nh khi

lng th tch

TCVN 8817-15:2011, Nh tng nha ng a xt Phng php th Phn 15: Xc nh

dnh bm vi ct liu ti hin trng

5

TIU CHUN QUC GIA TCVN 8817-5:2011

Nh tng nha ng a xt - Phng php th -

Phn 5: Xc nh in tch ht

Cationic Emulsified Asphalt - Test Method -

Part 5: Test Method for Particle Charge

1 Phm vi p dng

Tiu chun ny c s dng nhn bit nh tng nha ng a xt. Nhng ht c tch in

dng c nhn bit nh l cation.

2 Ti liu vin dn

Cc ti liu vin dn sau y l cn thit p dng tiu chun ny. i vi cc ti liu vin dn

ghi nm cng b th p dng bn c nu. i vi cc ti liu vin dn khng ghi nm cng b

th p dng phin bn mi nht, bao gm c cc sa i, b sung (nu c).

TCVN 8817-12:2011, Nh tng nha ng a xt Phng php th Phn 12: Nhn bit nh

tng nha ng a xt phn tch chm

ASTM E1, Standard specification for ASTM thermometers (Quy nh k thut i vi nhit k

ASTM)

3 Tm tt phng php th

t hai in cc song song nhau vo trong cc ng mu th nghim, cho dng in mt chiu

chy t in cc ny n in cc kia. Sau khi th nghim, ly cc in cc ra v quan st, nh

gi mc dnh bm ca cc ht nha trn b mt cc in cc.

Nu c nha dnh bm trn b mt ca-tt (in cc m) trong khi b mt a-nt (in cc dng)

tng i sch th kt lun mu th nghim l nh tng nha ng a xt.

4 Thit b v dng c th

4.1 Ngun in mt chiu 12V, mt mi-li-am-pe k v mt bin tr (xem Hnh 1, Hnh 2).

TCVN 8817-5: 2011

6

4.2 in cc: 2 tm thp khng r c kch thc 25,4 mm x 101,6 mm, c t song song cch

nhau mt khong l 12,7 mm (xem Hnh 3).

4.3 B phn cch in: L mt thanh c tit din hnh vung cnh 12,7 mm lm bng vt liu tng

hp Polytetrafloroethylene (xem Hnh 3).

4.4 Cc thu tinh dung tch 250 mL.

4.5 Thanh : Lm bng thu tinh hoc vt liu cch in ph hp khc gi cc in cc trong

cc thy tinh khi th nghim.

4.6 B n nhit: C kh nng duy tr c nhit th nghim quy nh trong gii hn cho php

ca tiu chun ny.

4.7 Nhit k ASTM loi 19C hoc 19F ph hp vi tiu chun ASTM E1 (nhit k thu ngn c

phm vi o t 49 oC n 57 oC, c vch chia 0,1 oC).

4.8 ng h bm giy.

4.9 Nc ct v isopropyl.

5 Tin hnh th

5.1 t bnh ng mu th vo trong b n nhit c nhit 71 oC 3 oC cho ti khi nhit ca

mu th t n 50 oC 3 oC; dng a khuy u nhit mu ng nht.

5.2 mt lng mu th vo cc thu tinh dung tch 250 mL sao cho khi th nghim, cc in

cc c ngp su trong mu mt on khong 25,4 mm.

5.3 t thanh vo gia hai in cc pha di ca b phn cch in, hai u thanh c

gc ln hai thnh bn i din ca ming cc thu tinh.

5.4 Ni cc in cc vi ngun in mt chiu.

CH THCH 1 : Trc khi th nghim, cn lm sch cc in cc theo trnh t sau: Ra ln 1 bng nc

ct, ra ln 2 bng isopropyl ((CH3)2-CHOH) hoc ethyl alcohol (C2H5OH), sau ra li bng nc ct.

5.5 iu chnh bin tr c dng in 8 mA (y l dng in nh nht, cng c th s dng

dng in ln hn nhng phi ghi li gi tr dng in s dng). Dng ng h bm giy xc nh

thi gian k t khi bt u cho dng in chy qua.

5.6 Khi dng in gim xung cn 2 mA hoc sau khong thi gian 30 pht (tu theo iu kin

no n trc), ngt ngun in, ly cc in cc ra khi cc ng mu, dng nc ct ra cc

in cc nh nhng v u khp.

TCVN 8817-5: 2011

7

Hnh 1 - Thit b th nghim in tch ht

T1

R4S1B

R2

M1

R3C1

D1R1

S1A

Ni vi CATHODE

Ni vi ANODE

TtCao

Thp

C1 - T in 500 F, 25 V R3 - in tr 6800 , 1/ 4 W

D1 - i t si lc S1 - Nm xoay 2 cc, 3 v tr

R1 - in tr 47 , 1W T1 - Bin th 12,6 V

R2 - ng h o in th 5000 M1 - Mili am pe k 0 10 mA

R4 - Thit b i hng

Hnh 2 - S lp t thit b th nghim

TCVN 8817-5: 2011

8

12,7

Mt bnMt truc

Mt trn

19,1

12

,7

19,1

12

,7

19

,1

10

1,6

0,80,8

Hnh 3 - B phn cch in

5.7 Quan st s dnh bm ca nha trn cc in cc, nu l nh tng nha ng a xt, s c

nha dnh bm trn b mt ca-tt (in cc m) trong khi b mt a-nt (in cc dng) tng

i sch. Nu nhn thy du hiu nha dnh bm trn ca-tt r rng hn khi so snh vi a-nt th

kt qu th nghim cng c cho l t.

CH THCH 2 : Nu kt qu th nghim khng th kt lun c v mu th nghim l nh tng nha

ng a xt phn tch chm th phi thc hin th nghim theo TCVN 8817 -12:2011.

6 Bo co th nghim

Bo co kt qu th nghim vi cc thng tin sau:

- ln dng in s dng;

- Nu c nha dnh bm trn b mt ca-tt, bo co kt qu ghi l dng.

7 chm v chch

- Hin nay cha c nhn xt v chm v chch ca tiu chun ny.

Kch thc tnh bng milimet